Chicago-Latrobe
Chicago-Latrobe 46495 11.5 mm Cobalt 135 Deg Jobber Drill Bit
11.5 mm cobalt jobber drill bit with a 135-degree split point for hard-metal drilling
- TypeDrill Bits
- MaterialHAWA
- Cobalt steel resists heat for longer tool life
- 135-degree split point starts holes without wandering
- 5 mm diameter suits metric drilling tasks
- Jobber length of 142.00 mm gives standard reach
- Decimal size .4528 matches precise engineering specs
Drill Bit Size 11.5 mm
This Chicago-Latrobe 46495 jobber drill bit has an 11.5 mm diameter and a 135-degree split point. The cobalt construction is suited for drilling hard metals such as stainless steel. It targets machinists and maintenance technicians who need a durable bit for tough materials.
Upgrade From Standard High-Speed Steel Bits
The cobalt alloy withstands higher temperatures than standard high-speed steel, reducing wear when drilling abrasive alloys. The jump is worth it when a general-purpose bit dulls quickly or walks on hard surfaces. The split point improves centring without a centre punch.
Behaviour Under Sustained Load
Cobalt retains hardness at elevated temperatures generated during extended drilling cycles. The 135-degree point geometry distributes cutting forces to resist chipping during continuous use. The straw bronze finish aids chip evacuation to prevent binding in deep holes. Non-coolant-through design relies on external lubrication for heat management.
Highlights
- Cobalt steel resists heat for longer tool life
- 135-degree split point starts holes without wandering
- 5 mm diameter suits metric drilling tasks
- Jobber length of 142.00 mm gives standard reach
- Decimal size .4528 matches precise engineering specs
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
Will the 11.5 mm shank fit my standard drill chuck?
The 11.5 mm diameter fits any chuck that opens to at least 11.5 mm; most 13 mm capacity chucks accept it without an adapter.
How do I start a hole with the 135-degree split point without the bit walking?
Apply firm, centred pressure at low speed; the 135-degree split point self-centres, but letting the bit spin before contact is the common mistake that causes walking.
When should I replace this cobalt jobber bit?
Replace it when the cutting lips show visible rounding or the straw/bronze surface colour wears to bare steel, indicating the cobalt edge is gone.
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